Research / Scientific
     World Wide Web Consortium
     LPIS Research Group
     PDDL and International Planning Competitions
     SemWebCentral: Open Source Tools for the Semantic Web
     OWL-S Semantic Web Service Test Collection
     Hellenic Artificial Intelligence Society

Can't live without
     Google's your friend
     If it's not in Wikipedia, it doesn't exist
     Youtube: the ultimate way to waste time

Demoscene
     What is this?
     ...and an alternative "definition" by Grant Smith
     scene.org
     pouet.net

People
     Michael Georgoulopoulos (aka Samurai)
     John Tsiombikas (aka Nuclear)
     Kostas Michalopoulos (aka Badsector)
     Ektoras Karagiannis (aka Cybernoid)
     Argiris Tsadimas
     Giouli Dede
     Alexandros Dais

Personal
     My Facebook profile
     My Twitter
     Lost in the Underflow (or directly download from here)
     Blue Wire (or directly download from here)

Unclassified
     Convex Games